Evolutionary Road...

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Study Catches Two Bird Populations As They Split Into Separate Species

ScienceDaily (July 14, 2009) — A new study finds that a change in a single gene has sent two closely related bird populations on their way to becoming two distinct species. The study, published in the August issue of the American Naturalist, is one of only a few to investigate the specific genetic changes that drive two populations toward speciation.

full article here.